I've noticed that many/most of my older thumbnails are "losing their memory" - they're no longer cropped like I originally did them. Instead, they're just the default cropping. I have thousands of images in my catalog... This seems to only happen with older ones.
At one point, I had a security breach and had to re-install and lost all my thumbnail crops, but since then I've sloooowly been fixing them (a painfully slow process). now, I've started to notice that thumbnails I've fixed or posted about 1.5 years ago revert to the default cropping.
Has anyone else seen this? and any idea what might be going on?